Fig. 4
From: A molecular basis for spine color morphs in the sea urchin Lytechinus variegatus
High Resolution micro Computed Tomography (microCT). A and B are low magnification images of LvWhite spines. All other images are transverse tomography sections of spines from S. purpuratus, LvWhite, LvGreen, and LvRed, taken approximately 25% from the base of the spine (top row) and 25% from the tip of the spine (bottom row). Spines from Lv are approximately 1 millimeter in diameter whereas in Sp they are ~ 1.5 millimeters, all depending on where in the spine the cross section is taken. .
